Keyboard



FIG. 1 is a top plan view of the keyboard showing our new design;

FIG. 2 is as front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a back elevational view thereof;

FIG. 6 is a bottom plan view thereof.

The ornamental design for a keyboard, as shown.